منابع مشابه
Effectiveness of Call-broadcast Surveys to Detect Territorial Peregrine Falcons
—We developed and tested a 10-min call-broadcast survey protocol using conspecific vocalizations to assess Peregrine Falcon (Falco peregrinus) territory occupancy in the Mojave Desert of southern Nevada and northwestern Arizona from 2008–10. Response rate of peregrines, when adults were confirmed present immediately prior to broadcasting, averaged 83% during the breeding season and peaked at 10...
متن کاملPeregrine Falcons Enable Two Species of Colonial Seabirds to Breed Successfully by Excluding Other Aerial Predators
—The breeding success of Common Murres (Uria aalge) and Pelagic Cormorants (Phalocrocorax pelagicus) at Triangle Island, off British Columbia, Canada, was high from 2003 to 2006; four years in which a pair of Peregrine Falcons (Falco peregrinus) nested in the vicinity. However, in three years when the falcon eyrie was inactive (2007 to 2009), adult murres were depredated on the colony by Bald E...
متن کاملSex in the City: Breeding Behavior of Urban Peregrine Falcons in the Midwestern US
Peregrine falcons (Falco peregrinus) were extirpated from most of the continental United States by widespread use of the pesticide DDT in the 1960s. Populations have rebounded with banning of the pesticide and successful implementation of captive breeding and hacking programs. An essentially new population of Midwestern peregrines now exists that is comprised almost entirely of urban-nesting bi...
متن کاملOrganochlorine Compounds in the Plasma of Peregrine Falcons and Gyrfalcons Nesting in Greenland
Levels of organochlorine compounds in the blood plasma of after-second-year female peregrine falcons (Falco peregrinus) were determined from samples collected from southern Greenland in 1985 and western Greenland from 1983 to 1989, and from adult and nestling gyrfalcons (Falco rusticolus) from western Greenland in 1989 and 1990. Samples were taken during nesting. Levels of p,p'-DDE (DDE) in per...
متن کاملIntraspecific evolutionary relationships among peregrine falcons in western North American high latitudes
Subspecies relationships within the peregrine falcon (Falco peregrinus) have been long debated because of the polytypic nature of melanin-based plumage characteristics used in subspecies designations and potential differentiation of local subpopulations due to philopatry. In North America, understanding the evolutionary relationships among subspecies may have been further complicated by the int...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1964
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay2806